Question

(4-sq rt 3)(4+ sq rt 3)

a. 13-8 sq rt 3
b. 5-8 sq rt 3
c. 13
d. 5

Answer 1

hint use (a-b)(a+b)=a^2-b^2

Answer 2

\[(4-\sqrt{3})(4+\sqrt{3})\]

Answer 3

A ?

Answer 4

no....
another hint
\[(\sqrt{a})^{2}=a\]

Answer 5

ok so b ?

Answer 6

\[(4-\sqrt{3})(4-\sqrt{3})=4^{2}-(\sqrt{3})^{2}\]
=\[16-3\]
=\[13\]

Answer 7

got it??

Answer 8

the answer is C